If by using it with HTML you mean to say you are writing script inline then stop.
This has so many negatives and I won't list them all to save time.
Abstract the javascript to a separate file and only use inline to initialise the script.
Here's an example of abstracting scripts with classes (uses mootools) http://digitarald.de/project/autocompleter/
Here's the example you should be following:
http://jqueryui.com/demos/toggle/
<script>
$(function() {
// run the currently selected effect
function runEffect() {
// get effect type from
var selectedEffect = $( "#effectTypes" ).val();
// most effect types need no options passed by default
var options = {};
// some effects have required parameters
if ( selectedEffect === "scale" ) {
options = { percent: 0 };
} else if ( selectedEffect === "size" ) {
options = { to: { width: 200, height: 60 } };
}
// run the effect
$( "#effect" ).toggle( selectedEffect, options, 500 );
};
// set effect from select menu value
$( "#button" ).click(function() {
runEffect();
return false;
});
});
</script>
<div class="demo">
<div class="toggler">
<div id="effect" class="ui-widget-content ui-corner-all">
<h3 class="ui-widget-header ui-corner-all">Toggle</h3>
<p>
Etiam libero neque, luctus a, eleifend nec, semper at, lorem. Sed pede. Nulla lorem metus, adipiscing ut, luctus sed, hendrerit vitae, mi.
</p>
</div>
</div>
<select name="effects" id="effectTypes">
<option value="blind">Blind</option>
<option value="bounce">Bounce</option>
<option value="clip">Clip</option>
<option value="drop">Drop</option>
<option value="explode">Explode</option>
<option value="fold">Fold</option>
<option value="highlight">Highlight</option>
<option value="puff">Puff</option>
<option value="pulsate">Pulsate</option>
<option value="scale">Scale</option>
<option value="shake">Shake</option>
<option value="size">Size</option>
<option value="slide">Slide</option>
</select>
<a href="#" id="button" class="ui-state-default ui-corner-all">Run Effect</a>
</div>